kmalloc is failing and kernel is hanging

I have an ARM PXA-255 board with an LCD support. I have ported kernel 2.6.26.3 on it and am trying to make frame buffer driver up for my board. I m able to able to get the backlight on tho LCD panel. In pxafb.c file, the function pxafb_probe is calling pxafb_init_fbinfo function. This pxafb_init_fbinfo is then allocating some memory by calling kmalloc. The kmalloc fails here and my kernel hangs.

I am able to able to figure out the problem as kmalloc as returning a valid address to the variable fbi. I also tried with GFP_ATOMIC flag in kmalloc but still the problem exists.
Any help to solve this problem will be highly appreciated.

Others are getting kernel panic problems with compiling routines for that ARM processor. A quick search on Google will find many of them. Here is one:

http://www.infradead.org/pipermail/l...ay/015433.html

What does the "fbi" variable do?
How much memory are you allocating "allocating some memory"? Post your allocation code here.

Hi,

I very new to linux porting please help me.As you are already ported Linux on PXA255 arm proceesor I felt u are the right guy to help me because even I am trying to port linux 2.6.26.3 on my PXA255 ARM processor board.and I am using Uboot as boot loader.
I configured and compile the code and while booting i am getting the kernal panic.Below is my booting sequenc ,please chek this and guide me in this regard.

$ bootm 0xa2000000

## Booting image at a2000000 ...

Image Name: Linux-2.6.27-smp

Created: 2008-12-15 5:42:11 UTC

Image Type: ARM Linux Kernel Image (uncompressed)

Data Size: 1258716 Bytes = 1.2 MB

Load Address: a0008000

Entry Point: a0008000

Verifying Checksum ... OK

OK



Starting kernel ...



linux cleanedUncompressing Linux................................................

................................... done, booting the kernel.

<3>ohoo linux<5>Linux version 2.6.27-smp (root@linux-6orh) (gcc version 4.3.2 (S

ourcery G++ Lite 2008q3-41) ) #7 Mon Dec 15 11:12:03 IST 2008

CPU: XScale-PXA255 [69052d06] revision 6 (ARMv5TE), cr=0000397f

Machine: <NULL>

<4>Ignoring unrecognised tag 0x54410008

Memory policy: ECC disabled, Data cache writeback

<1>bootmem alloc of 4096 bytes failed!

<0>Kernel panic - not syncing: Out of memory

Thnaks &Regards,
Rekha